Catalog B - Chronographs and Accessories

Contributions from the Radio Frequency Laboratories No. 18 - Effect of Cavity Resonance on the Frequency Response Characteristic of the Condenser Microphone

An Efficient Loud Speaker at the Higher Audible Frequencies: A Description of a Loud Speaker Designed for Use as an Adjunct to Existing Types to Permit Efficient Radiation at the Higher Audible Frequencies